connolly



(NO Model.) 2 She'etsSheet 1,

M. D. 85 T. A. OONNOLLY.

SPRING ATTACHMENT FOR CHAIRS.

No. 354,044. Patented Dec. 7, 1886.

) 4 H Hlll 1 III M, ,4- I] A Z; 4 x 4 E I F G l G (No Model.) 2Sheets-Sheet 2. M. D. & T. A. OONNOLLY.

SPRING ATTACHMENT FOR CHAIRS.

354,044. Patented Dec. 7, 1886,

- MET Emu H x "i Nrrn STATES PATENT OFFICE.

M. DANIEL CONNOLLY, OF PHILADELPHIA, PA., AND THOMAS A. CONNOLLY, OFWASHINGTON, D. C., ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE ROCKER SPRINGCOMPANY, OF CHICAGO, ILL.

SPRING ATTACHMENT FOR CHAIRS.

SPECIFICATION forming part of Letters Patent 11035 dated December 7.1886. Original application filed July 30, 1880, Serial No. 14,470.Divided and this application filed March 23, 1885. Serial No. 160,520.

To aZZ whom it may concern:

Be it known that we, M. DANIEL CONNOLLY and THOMAS A. CONNOLLY, citizensof the United States, residing, respectively, at the city ofPhiladelphia, in the county of Philapelphia and State of Pennsylvania,and the city of \Vashington, in the District of Columbia, have jointlyinvented certain new and useful Improvements in Tilting and Booking [0Chairs, for which we made application for Letters Patent July 30, 1880,Serial No. 14,470, and of which the following is a divisionalspecification.

In the accompanying drawings, Figure 1 is I a front view, partly'incross-section, of a chair havingits base and seat parts connected by oneof our springs, the side edges of the boxes forming the rockers beingparallel and meeting each other at a point about the diainetrical centerof the spring; Fig. 2 the same, ex-

cept that the greater portion of both the seat and base part is omitted,and Fig. 3 the same as Fig. 2, exceptthat a part of the clamp is removedto show the central extension or straightened portion of the spring.

In the drawings we have shown our invention as applied to a revolvingo'ffice-chairpro Vided with rockers secured to the under side of itsseat part and a lower support therefor on its base part; and in thesedrawings A indie-ates the chair-seat; B, the base; E, the upper rockers;F, the lower support or rockers on which the upper rockers rest andmove; G, the connectirig-spring; h, a securing clamp or 5 clip, and tinuts securing the ends of the sprlng.

The object of our invention is to provide a chair consisting of a. seathaving rockers secured to its under side and a base having a lowersupport for said rockers with a connecting-spring having itslongitudinal axis horizontal. this spring to have two coils formed fromone continuous piece of wire, and constituting, substantially, twoseparate or inde- 4 5 pendent springs, and to be of sutficientstrength(No model.)

and tension to securely connect the base and seat parts together andhold the rockers in firm alignment with their support, so as to preventsaid rockers from slipping backward or forward or sidewise thereon. 0

As shown in the drawings, the ends of the coils pass through one portionof the base part of the chair, being then secured by nuts, and themiddle or extended part of the wire passes through a clamp or bracket,being thereby se- 5 cured to the seat part.

The coils of the spring may be in the same direction or oppositely.

We are aware of the Lamprecht patent of September 5, 1876; but ourinvention differs from the construction therein shown in that our springconstitutes the connection between the seat and base parts of the chairfor holding the rockers and their support in alignment and properrelative position, in that our 6 spring is not wound around a bar orrod, and in that its straightened portion, instead of being made in theform of a square or U-shaped, extends directly across from one coil ofthe spring to the other.

IVe claim The combination, in a chair, of a seat having rockers securedto its under side, a base having a lower supportfor said rockers, and aconnecting-spring having two coils formed 7 from one continuous piece ofwire and separated by a straight portion thereof, such spring havingitslongitudinal axis horizontal and being secured at its center to one partof the chair by a clamp and at its ends to another part of the chair bynuts, and constituting the connection between the seat and base parts ofthe chair for holding the rockers and their lower support in alignmentand proper relative position, substantially as described.

M. DANL. CONNOLLY. THOS. A. CON N OLLY.

\Vitnesses:

EPHRAIM BANNING, Isaac H. OHARRA.

